CN107700361B - A kind of dumb-bell shape grout sleeve and the method for carrying out assembly construction with the grout sleeve - Google Patents
A kind of dumb-bell shape grout sleeve and the method for carrying out assembly construction with the grout sleeve Download PDFInfo
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- CN107700361B CN107700361B CN201710903715.1A CN201710903715A CN107700361B CN 107700361 B CN107700361 B CN 107700361B CN 201710903715 A CN201710903715 A CN 201710903715A CN 107700361 B CN107700361 B CN 107700361B
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- grout sleeve
- grouting
- dumb
- grout
- bell shape
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/61—Connections for building structures in general of slab-shaped building elements with each other
- E04B1/6108—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together
- E04B1/612—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together by means between frontal surfaces
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
Abstract
The invention discloses a kind of dumb-bell shape grout sleeve and the methods for carrying out assembly construction with the grout sleeve, the dumb-bell shape grout sleeve, including two longitudinal arrangements and the concordant grout sleeve of height, and the rectangular enclosure for connecting two grout sleeves, it is communicated between the grout sleeve and the rectangular enclosure, one of them described grout sleeve outer upper is equipped with a thick liquid discharge mouth, lower part is equipped with a stock inlet, Ribbed Bar is inserted into sleeve of the inner cavity with annular protrusion, then it pours into dedicated high-strength, contraction-free grouting concrete, two sides grout sleeve works at the same time, make two sides end bar connection up and down, to reach the connection effect for being higher than parent material of reinforcement rebar intensity in rapid construction, construction efficiency and building structure overall performance can be effectively improved, simplify construction technology, and it is suitble to requiring high and earthquake frequency to construction environment The application of hair area.
Description
Technical field
The present invention relates to a kind of precast assembly provisions for grouting and technical field of construction, especially a kind of dumb-bell shape grout sleeve
And the method for assembling construction is carried out with the grout sleeve.
Background technique
With the rapid development of communication, bridge, the project amount of road is also being continuously increased, and we apply bridge
The requirement of work technology be it is higher and higher, simultaneously because science of bridge building, the especially bridge on highway, railway, Suo Yougong
Journey requires the time of site operation as far as possible short, to reduce the risk of site operation, guarantees communications and transportation, reduces because applying
Work blocks inconvenience brought by traffic, avoids weather from seriously affecting construction as far as possible, therefore have developed a series of applicable buildings
Industrialized technology.
Prefabricated concrete structure building is mostly built using industrialization technology at present, is the structure for the primary structure that will be constructed
Part uses prefabrication, the construction technology of on-site consolidation.Such construction technology has comparable technical advantage and construction characteristic,
It can guarantee going on smoothly for bridge construction, and can guarantee the unobstructed of urban transportation.In bridge rapid construction, with prefabricated components
Be for concrete structure made of main bearing member assembly connection it is extremely important, reinforced bar sleeve grouting connection is that assembled is mixed
The important connection type of Xtah Crude Clay structure is one of the important directions of current architecture configuration development.
What is be widely used at present is single tube grout sleeve, and interconnection technique principle is:, will be special after connection reinforcing bar insertion sleeve
Pour into sleeve with grouting material, full of the gap between sleeve and reinforcing bar, after grouting material hardening with reinforcing bar cross rib and sleeve lining shape
At tightly engaging, and the effective force between reinforcing bar and sleeve, two reinforcing bars are linked together.Conventional grout sleeve is shearing
It is isolated mutually in wall, so inevitably will appear grouting mouth grout outlet pipeline when arranging inner barrel mud jacking pulp pipeline
Too much, internal pipeline falls off, and concrete spillage enters in pipeline the problem of causing the later period to block mud jacking pipeline.Moreover, using passing
Grout sleeve of uniting is constructed, unfavorable for the globality of thin-walled metope.When encountering hollow section bridge pier, construction personnel is not easily accessible
Inside processing, site operation is difficult, and working efficiency is lower, is easy to influence project progress.In addition the wall face of architectural engineering, construction
Personnel do not have scaffold that cannot construct, not only bad for construction efficiency, it could even be possible to engineering accident occurs.
Summary of the invention
Novel construction efficiency and building structure globality can be reliably and effectively improved the object of the present invention is to provide a kind of
Can, simplify construction technology, and be suitble to construction environment require high and earthquake take place frequently area application reinforcing bar grout sleeve and its
Construction method.
To achieve the goals above, a kind of dumb-bell shape grout sleeve provided by the invention, it is characterised in that vertical including two
To the grout sleeve of arrangement, and the cavity body structure for connecting two grout sleeves, the grout sleeve and the chamber
It is communicated between body structure；One of them described grout sleeve outer upper be equipped with a thick liquid discharge mouth, lower part be equipped with one into
Starch mouth.
Preferably, the grout sleeve height is concordant, and inside middle portion is equipped with twice steel hoop retaining ring.
Preferably, the cavity body structure is rectangular enclosure, and intracavitary thickness is identical as the diameter of connected reinforcing bar, inner wall light
It is sliding.
Preferably, the upper surface of the rectangular enclosure is lower than the grout sleeve upper surface, and lower end surface is higher than the grouting
Sleeve lower surface.
Preferably, the grout sleeve medial surface is equipped with annular protrusion.
Preferably, the grout sleeve both ends have sealing ring.
The length of the grout sleeve is at least 20 times of connection bar diameter.
A kind of assembling constructing method of the dumb-bell shape grout sleeve according to, it is characterised in that construction procedure is as follows:
1) Primary Location: first by connected reinforcing bar, grafting is mounted in two grout sleeves respectively, and in the filling
The both ends of slurry sleeve are respectively mounted sealing ring；
2) preparation: before carrying out grouting works, first determination is unobstructed into thick liquid discharge mouth, checks whether pollution, moistens prefabricated
Component and grouting material contact surface, smear the levelling contact surface of epoxy resin mortar, and hoisting prefabricated component adjusts verticality；
3) in strict accordance with proportions grouting material, proportioned grouting material mixing grouting material: is poured into filling after mixing evenly
It starches in equipment, guarantees the slump of grouting material；
4) it is in the milk: after upper member is vertically put into lower member, the grouting material mixed being imported into grouting pump, starting grouting
Pump, when the grouting material of grouting pump mouth outflow is linear, using grouting method from bottom to top, by grout pipe insertion prefabricated components into
Mouth is starched, after the grout sleeve thick liquid discharge mouth flows out grouting material, blocks the thick liquid discharge mouth immediately, after holding pressure, extraction grout pipe is same
When quickly block stock inlet, other stock inlets of prefabricated components are successively equally in the milk；
5) test block indwelling: should carry out construction quality inspection record after completing grouting in time, retain image data, and described
The matched grouting material of dumb-bell shape grout sleeve carries out resistance to compression detection according to the taken test block group of each construction section.
Preferably, the grouting material mixture should be finished in 0.5h after preparation, after checking mix after completing
Grouting material fluidity guarantees that fluidity is not less than 300mm.
Preferably, after the thick liquid discharge mouth is blocked when grouting, a length of 60s when pressure is held.
It is provided by the invention, it has the following beneficial effects:
1. the grout sleeve can reliably and effectively improve construction efficiency, reinforce the globality of thin-walled, it is whole to promote bridge
Stability, can meet earthquake take place frequently the Special sections such as area to sleeve grouting interconnection technique requirement.It is filled using the dumb-bell shape
When starching sleeve progress Construction Arrangement, it is only necessary to pour into slurry on the outside, need not open up again into thick liquid discharge mouth on inner barrel, may be used also
To control adjacent sleeve spacing, greatly reduce into plasma discharge pipeline, avoids the occurrence of the mixed and disorderly uncontrollable problem of arrangement, build high exterior wall
When body and hollow section bridge pier, construction personnel uses the completion grouting process that the grout sleeve on the outside can be simple and convenient,
Construction period can be shortened, improve the working environment of worker, moreover it is possible to reduce operating risk.
2. twice steel hoop retaining ring set by the grout sleeve inside middle portion, the connection reinforcing bar with ribbing of both ends insertion into
After entering the grout sleeve, the rib connected on reinforcing bar is stuck on the reinforcing bar retaining ring, is played limitation and is fixedly connected with reinforcing bar in the filling
The effect of bushing core position is starched, guarantees secure and reliable connection.
3. the intracavitary thickness of the rectangular enclosure is identical as the diameter of connected reinforcing bar, inner wall smooth, it is ensured that smooth
Grouting, so that grouting material is quickly filled with the gap between sleeve and reinforcing bar, after grouting material hardening with reinforcing bar and the grout sleeve
Formation tightly engages, avoid the occurrence of grouting it is insufficient, there is shrinkage porosite etc., cause the intensity of made wall low.
4. the upper surface of the rectangular enclosure is lower than the grout sleeve upper surface, lower end surface is higher than under the grout sleeve
Surface, it is ensured that the straightness of the grout sleeve upper and lower surface is conducive to guarantee entire prefabricated components wall in subsequent assembly
The verticality of body, avoids the occurrence of security risk, improves the anti-seismic performance of wall.
5. the grout sleeve medial surface is equipped with equally distributed annular protrusion, it is ensured that the firm of reinforcing bar connection can
It leans on, strengthens the globality of wall, improve the anti-seismic performance of wall.
6. the grout sleeve both ends have sealing ring, grouting material leakage can effectively prevent, and effectively fill
The gap for connecting reinforcing bar and the grout sleeve connecting portion avoids reinforcing bar from occurring loosening during grouting, tilt.
Detailed description of the invention
Fig. 1 is a kind of dumb-bell shape grout sleeve structural schematic diagram；
Fig. 2 is the cross-section diagram in Fig. 1 along the direction B-B；
Fig. 3 is rectangular enclosure in Fig. 1 along the cross-section diagram in the direction A-A；
Fig. 4 is the grout sleeve layout drawing of shear wall cross section；
Fig. 5 is the vertical lifting figure of shear wall prefabricated components；
Fig. 6 is shear wall mud jacking figure；
Fig. 7 is the grout sleeve layout drawing of hollow section bridge pier；
Fig. 8 is the prefabricated components installation diagram of hollow section bridge pier；
In figure:
1. 6. reinforcing bar 7. of the first 5. stock inlet of grout sleeve 2. second grout sleeve, 3. rectangular enclosure, 4. thick liquid discharge mouth
12. sealing ring of grouting material 8. lower member, 9. upper member, 10. epoxy resin mortar, 11. steel hoop retaining ring, 13. annular protrusion.
Specific embodiment
As shown in Figure 1, Figure 2 and Figure 3, a kind of dumb-bell shape grout sleeve, including longitudinal arrangement and highly concordant first fills
Starch sleeve 1 and the second grout sleeve 2, and the rectangular enclosure 3 for connecting two grout sleeves, the first grouting set
It is communicated between the 1, second grout sleeve 2 of cylinder and the rectangular enclosure 3.The structure size of two grout sleeves is identical,
Sleeve outer diameter is 3 times for connecting 6 diameter of reinforcing bar, and length sleeve is that connection reinforcing bar 6 does not occur to bond length required for bond-slip
Degree at least connects 20 times of bar diameter.The grout sleeve inside middle portion is equipped with twice steel hoop retaining ring 11, and both ends are inserted
After the connection reinforcing bar 6 with ribbing entered enters the grout sleeve, the rib connected on reinforcing bar is stuck on the steel hoop retaining ring 11, is risen
Limitation is fixedly connected with reinforcing bar in the effect of the grout sleeve center, guarantees that its surrounding has grouting gap about the same.
The grout sleeve medial surface is equipped with equally distributed annular protrusion 13, is increased between the slurry of solidification by concave-convex embedded structure
Strong curable grip prevents rebar junction and wall to be detached from, enhances the globality and anti-seismic performance of wall.For connecting described in two
Grout sleeve 1 and 2 plays the rectangular enclosure 3 of transmitting effect, the intracavitary diameter with a thickness of connection reinforcing bar 6, inner wall smooth.Institute
The upper surface of rectangular enclosure 3 is stated lower than the grout sleeve upper surface, lower end surface is higher than the grout sleeve lower surface, Ke Yibao
Demonstrate,prove the straightness of prefabricated components upper and lower end face.It is stock inlet 5 on the downside of 2 outer wall of the second grout sleeve positioned at outside, on
Side is thick liquid discharge mouth 4, and inner wall is got through, and is connected with cavity, and first grout sleeve 1 and 2 both ends of the second grout sleeve have close
Seal 12 prevents slurry from leaking, and grouting material 7 is injected sleeve inner by the stock inlet 5 when work, it is empty to flow through the rectangle
Chamber 3, Self-leveling grouting material can guarantee that inside first grout sleeve 1 is in the milk sufficiently between two grout sleeves, reach on the inside of
Sleeve does not need to set the purpose into thick liquid discharge mouth.
A kind of assembling constructing method of the dumb-bell shape grout sleeve according to, it is characterised in that construction procedure is as follows:
1) Primary Location: first by connected reinforcing bar 6, grafting is mounted in two grout sleeves respectively, and in the filling
The both ends of slurry sleeve are respectively mounted sealing ring 12；
2) preparation: before carrying out grouting works, first determine that stock inlet 5, thick liquid discharge mouth 4 are unobstructed, check whether pollution.Such as
Shown in Fig. 5, prefabricated components and grouting material contact surface are moistened, smears the levelling contact surface of epoxy resin mortar 10 that intensity is high, plasticity is good,
Hoisting prefabricated component adjusts verticality；
3) mixing grouting material: in strict accordance with proportions grouting material 7, proportioned grouting material 7 is poured into after mixing evenly
In grouting equipment, grouting material 7 should be finished in 0.5h after preparation, and 7 fluidity of grouting material after mix is checked after completing,
Guarantee that fluidity is not less than 300mm, guarantees the slump of grouting material 7；
4) it is in the milk: as shown in fig. 6, importing and filling by the grouting material 7 mixed after upper member 9 is vertically put into lower member 8
Stock pump starts grouting pump, and when the grouting material 7 of grouting pump mouth outflow is linear, using grouting method from bottom to top, grout pipe is inserted
The stock inlet 5 for entering prefabricated components blocks the thick liquid discharge mouth 4 immediately, holds after the grout sleeve thick liquid discharge mouth 4 flows out grouting material 7
After pressing 60s, extraction grout pipe quickly blocks stock inlet simultaneously.Other reserved grout holes of prefabricated components are successively equally in the milk, must not
Leakage fill, prefabricated components must once grouting terminate, gap must not be carried out and be repeatedly in the milk.Must not make in 24 hours after slip casting component and
Key stratum is shaken, collides.
5) test block indwelling: should carry out construction quality inspection record after completing grouting in time, retain image data, and described
The matched grouting material of dumb-bell shape grout sleeve carries out resistance to compression detection according to the taken test block group of each construction section.
Embodiment one:
In construction projects, shear wall is primarily subjected to horizontal loading caused by wind load or geological process and vertical load
Active force (gravity), thus shear wall earthquake take place frequently the Special sections such as area Anti-pull-press performance it is particularly important.Such as Fig. 4,5 and 6
Shown, dumb-bell shape grout sleeve is used for precast concrete shear wall, since wall thickness is fixed, it is possible to reduce the use of single sleeve,
Convenient for batch production.For high-rise Side fascia, construct if wall is outer without scaffold worker's inconvenience, the dumb-bell shape grouting set
Cylinder is being equally spaced inside and outside side grout sleeve within the walls, controls adjacent sleeve spacing, greatly improves work efficiency, reduce cloth
Mixed and disorderly uncontrollable problem is set, has achieved the purpose that enhance globality, also more traditional grout sleeve is stronger for whole anti-seismic performance.
Embodiment two:
The dumb-bell shape grout sleeve and construction method are applicable not only to shear wall, are also applied for the steel of hollow section pier stud
Muscle connection, hollow section pier stud can make full use of material, and application is more extensive.As shown in FIG. 7 and 8, at hollow section of precast assembly
Dumb-bell shape grout sleeve technology is used in the reinforcing bar connection construction of face bridge pier, is solved worker and is difficult to enter bridge pier interior construction
Problem, construction personnel need to only be in the milk on the outside of bridge pier, reduce security risk, can improve the working environment and work of worker
Industry risk, the influence to periphery traffic and environment is smaller, and construction efficiency is higher.
The dumb-bell shape sleeve applies also for the case where solid section double muscle, such as rectangular section, tensile region can match
Double reinforcing bar.
Specific case used herein elaborates inventive concept, the explanation of above example is only intended to
Help understands core of the invention thought.It should be pointed out that for those skilled in the art, not departing from this
Under the premise of inventive concept, any obvious modification, equivalent replacement or the other improvements made should be included in the present invention
Protection scope within.
Claims (7)
1. a kind of dumb-bell shape grout sleeve, it is characterised in that the grout sleeve including two longitudinal arrangements, and for connecting two
The cavity body structure of a grout sleeve, communicates between the grout sleeve and the cavity body structure；Described in one of them
Grout sleeve outer upper is equipped with a thick liquid discharge mouth, and lower part is equipped with a stock inlet；The cavity body structure is rectangular enclosure, intracavitary
Thickness is identical as the diameter of connected reinforcing bar, inner wall smooth；The upper surface of the rectangular enclosure is lower than table on the grout sleeve
Face, lower end surface are higher than the grout sleeve lower surface.
2. dumb-bell shape grout sleeve according to claim 1, it is characterised in that the grout sleeve height is concordant, and middle part
Inside is equipped with twice steel hoop retaining ring.
3. dumb-bell shape grout sleeve according to claim 1, it is characterised in that the grout sleeve medial surface is equipped with annular
Protrusion.
4. dumb-bell shape grout sleeve according to claim 1, it is characterised in that the grout sleeve both ends have sealing
Circle.
5. a kind of assembling constructing method of dumb-bell shape grout sleeve according to any one of claims 1 to 4, feature exist
It is as follows in construction procedure:
1) Primary Location: first by connected reinforcing bar, grafting is mounted in two grout sleeves respectively, and is covered in the grouting
The both ends of cylinder are respectively mounted sealing ring；
2) preparation: before carrying out grouting works, first determination is unobstructed into thick liquid discharge mouth, checks whether pollution, moistens prefabricated components
With grouting material contact surface, the levelling contact surface of epoxy resin mortar is smeared, hoisting prefabricated component adjusts verticality；
3) mixing grouting material: in strict accordance with proportions grouting material, proportioned grouting material is poured into grouting after mixing evenly and is set
In standby, guarantee the slump of grouting material；
4) it is in the milk: after upper member is vertically put into lower member, the grouting material mixed being imported into grouting pump, starts grouting pump,
When the grouting material of grouting pump mouth outflow is linear, using grouting method from bottom to top, by grout pipe insertion prefabricated components into slurry
Mouthful, after the grout sleeve thick liquid discharge mouth flows out grouting material, the thick liquid discharge mouth is blocked immediately, and after holding pressure, extraction grout pipe is simultaneously
Stock inlet quickly is blocked, other stock inlets of prefabricated components are successively equally in the milk；5) it test block indwelling: should be done in time after completing grouting
Good construction quality inspection record retains image data, with the matched grouting material of dumb-bell shape grout sleeve according to each construction
The taken test block group of section carries out resistance to compression detection.
6. the assembling constructing method of dumb-bell shape grout sleeve according to claim 5, it is characterised in that the grouting material is mixed
Closing object should be finished in 0.5h after preparation, and the grouting material fluidity after mix is checked after completing, and guarantee that fluidity is not small
In 300mm.
7. the assembling constructing method of dumb-bell shape grout sleeve according to claim 5, it is characterised in that block institute when grouting
After stating thick liquid discharge mouth, a length of 60s when pressure is held.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710903715.1A CN107700361B (en) | 2017-09-28 | 2017-09-28 | A kind of dumb-bell shape grout sleeve and the method for carrying out assembly construction with the grout sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710903715.1A CN107700361B (en) | 2017-09-28 | 2017-09-28 | A kind of dumb-bell shape grout sleeve and the method for carrying out assembly construction with the grout sleeve |
Publications (2)
| Publication Number | Publication Date |
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| CN107700361A CN107700361A (en) | 2018-02-16 |
| CN107700361B true CN107700361B (en) | 2019-06-04 |
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| CN201710903715.1A Active CN107700361B (en) | 2017-09-28 | 2017-09-28 | A kind of dumb-bell shape grout sleeve and the method for carrying out assembly construction with the grout sleeve |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625477A (en) * | 2018-03-22 | 2018-10-09 | 武汉理工大学 | A kind of assembled beam-column node and its construction method |
| CN109457596B (en) * | 2018-10-22 | 2020-07-31 | 北京工业大学 | Prefabricated assembled pier connection structure and construction method |
| CN109853847A (en) * | 2019-02-01 | 2019-06-07 | 广州建筑产业研究院有限公司 | A kind of prefabricated column of non-interconnected grouting |
| CN110185205A (en) * | 2019-05-07 | 2019-08-30 | 上海应用技术大学 | A kind of assembled architecture reinforcing bar connection bridging type grout sleeve |
| CN110318498B (en) * | 2019-06-24 | 2023-08-15 | 天元建设集团有限公司 | Assembled building combined type connecting system and construction method thereof |
| CN112282120B (en) * | 2020-11-06 | 2021-11-02 | 湖南泽坤建筑设计有限公司 | Shear wall plate fast bin sealing device |
| CN112853946A (en) * | 2021-03-18 | 2021-05-28 | 长安大学 | Grouting sleeve, grouting sleeve connected assembled pier and construction method thereof |
| CN113417465B (en) * | 2021-07-30 | 2022-06-03 | 中国建筑第二工程局有限公司 | Assembled building grout sleeve grout system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3237050B2 (en) * | 1995-11-10 | 2001-12-10 | 東京鐵鋼株式会社 | Mortar-filled rebar joint |
| KR100584014B1 (en) * | 2003-01-08 | 2006-05-29 | 김용근 | Reinforcing bar coupler |
| JP2014051798A (en) * | 2012-09-06 | 2014-03-20 | Splice Sleeve Japan Ltd | Joint construction method of reinforcing-bar |
| KR20170040037A (en) * | 2015-10-02 | 2017-04-12 | (주)백암이노베이션 | A reinforcing rod coupler having a clamp |
| CN107044193A (en) * | 2017-04-26 | 2017-08-15 | 上海核工程研究设计院 | A kind of pair of sleeve steel concrete supporting device |
| CN106968381B (en) * | 2017-04-28 | 2023-09-22 | 广东省建科建筑设计院有限公司 | Assembled prefabricated shear wall and superimposed sheet node connected by combined grouting sleeve |
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